tango-tsg-service-chaining-engine/platform/include/policy.h

#ifndef _POLICY_H
#define _POLICY_H

#ifdef __cpluscplus
extern "C"
{
#endif

#include "utils.h"
#include "packet.h"
#include "global_metrics.h"
#include <linux/if_ether.h>

enum traffic_type
{
	TRAFFIC_TYPE_NONE = 0,
	TRAFFIC_TYPE_RAW = 1,
	TRAFFIC_TYPE_DECRYPTED = 2,
};

enum forward_type
{
	FORWARD_TYPE_NONE = 0,
	FORWARD_TYPE_STEERING = 1,
	FORWARD_TYPE_MIRRORING = 2,
};

enum session_action
{
	SESSION_ACTION_BYPASS = 0,
	SESSION_ACTION_FORWARD = 1,
	SESSION_ACTION_BLOCK = 2,
};

enum action_desc
{
	ACTION_BYPASS_DUE_DEFAULT = 0x00,
	ACTION_BYPASS_DUE_INVALID_POLICY = 0x01,
	ACTION_BYPASS_DUE_FAILURE_ACTION = 0x02,
	ACTION_BYPASS_DUE_UNAVAILABLE_ACTION = 0x03,
	ACTION_BYPASS_DUE_HEALTH_SF_LIMIT = 0x04,

	ACTION_BLOCK_DUE_FAILURE_ACTION = 0x10,
	ACTION_BLOCK_DUE_UNAVAILABLE_ACTION = 0x11,

	ACTION_FORWAED_DUE_SELECTED_SF = 0x20,
};

enum encapsulate_method
{
	ENCAPSULATE_METHOD_NONE = 0,
	ENCAPSULATE_METHOD_LAYER2_SWITCH = 1,
	ENCAPSULATE_METHOD_LAYER3_SWITCH = 2,
	ENCAPSULATE_METHOD_VXLAN_G = 3,
};

enum health_check_method
{
	HEALTH_CHECK_METHOD_NONE = 0,
	HEALTH_CHECK_METHOD_IN_BAND_BFD = 1,
	HEALTH_CHECK_METHOD_BFD = 2,
	HEALTH_CHECK_METHOD_HTTP = 3,
};

struct health_check
{
	enum health_check_method method;

	char url[128];
	char address[64];
	int retires;
	int interval_ms;
};

struct connectivity
{
	enum encapsulate_method method;
	int int_vlan_tag;
	int ext_vlan_tag;
	char dest_ip[64];
};

struct selected_sf
{
	uint64_t rule_id;
	int rule_vsys_id;
	enum traffic_type traffic_type;

	int sff_profile_id;
	enum forward_type sff_forward_type;

	int sf_vsys_id;
	int sf_profile_id;
	enum session_action sf_action;
	enum action_desc sf_action_desc;
	struct connectivity sf_connectivity;

	struct throughput_metrics rx;
	struct throughput_metrics tx;

	in_addr_t sf_dst_ip;
	u_char sf_dst_mac[ETH_ALEN];
	int sf_index;
};

struct selected_chaining
{
	struct selected_sf *chaining;
	int chaining_size;
	int chaining_used;

	uint64_t session_id;
	char *session_addr;
};

const char *traffic_type_tostring(enum traffic_type traffic_type);
const char *forward_type_tostring(enum forward_type forward_type);
const char *action_desc_tostring(enum action_desc action_desc);
const char *encapsulate_method_tostring(enum encapsulate_method encap_method);

struct selected_chaining *selected_chaining_create(int chaining_size, uint64_t session_id, char *session_addr);
void selected_chaining_destory(struct selected_chaining *chaining);
void selected_chaining_dump(struct selected_chaining *chaining);
void selected_chaining_bref(struct selected_chaining *chaining);
void selected_chaining_uniq(struct selected_chaining *chaining);

// return  NULL : error
// return !NULL : success
struct policy_enforcer *policy_enforcer_create(const char *instance, const char *profile, int thread_num);
void policy_enforcer_destory(struct policy_enforcer *enforcer);

// return  0 : success
// return -1 : error
int policy_enforcer_register(struct policy_enforcer *enforcer);
int policy_enforce_chaining_size(struct policy_enforcer *enforcer);
// direction 1: E2I
// direction 0: I2E
void policy_enforce_select_chainings(struct policy_enforcer *enforcer, struct session_ctx *s_ctx, struct packet *data_pkt, uint64_t rule_id, int direction);

#ifdef __cpluscplus
}
#endif

#endif